Year	% of children ages 12-23 months
1980	12.256021605110991
1981	22.562422992779886
1982	26.070373007850097
1983	31.2104909475976
1984	41.08119080901488
1985	47.7049117760046
1986	53.72654241873727
1987	57.32005703651427
1988	59.87492921853081
1989	63.34798114083076
1990	73.50880790711042
1991	73.42212475629144
1992	75.0834531668901
1993	77.32533344317316
1994	79.92803726674758
1995	81.42561592277029
1996	83.62690286980511
1997	84.0361073605272
1998	83.63945748755212
1999	86.07518165896083
2000	86.91955725209567
2001	88.42603861789343
2002	89.50362027568443
2003	90.88610935703034
2004	91.4617968380178
2005	91.55410432809693
2006	92.70245438641966
2007	93.4162830967497
2008	93.54884063737339
2009	93.416664032182
2010	93.25921831760833
2011	93.49059029983525
2012	94.05713591575207
2013	93.69546859375343
2014	93.57607487909047
2015	93.21376761478585
2016	93.31346644131712
2017	94.25162253957038
2018	94.45289721356478
2019	95.0963296814304
2020	94.98279771899382
2021	95.0143122834821
2022	94.7796144551577